System: Mac OSX 11 (Catalina), Rstudio with R version 3.6.3 (but have also tried 4.0 and 3.3), Xcode version 11.4.1
Went to: http://adv-r.had.co.nz/Rcpp.html#rcpp-intro and tried library(rcpp) which worked fine because I previously had installed the rcpp package. The following yields an error in finding config.h. I did a "find" on config.h and sure enough it is not in the clang++ -I directory references. Here is what I have tried: Installing Xcode's command line tools (which were installed using xcode-select --install) Also, downloaded and installed the version of clang8 and gfortran6.1 from: https://cran.r-project.org/bin/macosx/tools/ The following error occurs when I try this rcpp example from Hadley but it also happens whenever I try to install an R package from source. The compile fails due to not finding some include file. I would have thought that installing clang8 would have also included the proper include (.h) file directories with their contents needed by R. Is there something I am missing below? Thank you. > library(Rcpp) > cppFunction('int add(int x, int y, int z) { + int sum = x + y + z; + return sum; + }') In file included from fileb6e52d3a23c3.cpp:1: In file included from /Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include/Rcpp.h:27: In file included from /Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include/RcppCommon.h:29: In file included from /Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include/Rcpp/r/headers.h:67: In file included from /Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include/Rcpp/platform/compiler.h:100: In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:304: In file included from /usr/local/include/math.h:8: In file included from /usr/local/include/features.h:10: /usr/local/include/forwards.h:10:10: fatal error: 'config.h' file not found #include "config.h" ^~~~~~~~~~ 1 error generated. make: *** [fileb6e52d3a23c3.o] Error 1 clang++ -std=gnu++11 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -I"/Library/Frameworks/R.framework/Versions/3.6/Resources/library/Rcpp/include" -I"/private/var/folders/bt/1gd00p5s6n19m_bgh9b04gxc0000gp/T/RtmpRRyaky/sourceCpp-x86_64-apple-darwin15.6.0-1.0.4" -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -I/usr/local/include -fPIC -Wall -g -O2 -c fileb6e52d3a23c3.cpp -o fileb6e52d3a23c3.o Error in sourceCpp(code = code, env = env, rebuild = rebuild, cacheDir = cacheDir, : Error 1 occurred building shared library. >
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